Unit of Biological Mass Name Suggestions?

Since I have argued for an independent standard of measure for fitness, similar to the standard block of platinum iridium that is the kilogram, this has led me to wonder what to call the new measurement. In my mind whenever I had been thinking about fitness I just thought ‘mass_b‘ or ‘biological mass’. But this really isn’t the unit of measure, this is a description of what we are measuring. So what is needed is the name equivalent of the kilogram for a unit of biological mass. Since ‘Darwin’ is already taken, I am not immediately sure of a name. Perhaps ‘Watson’ or ‘Crick’ would do, but their names are more associated with genetics and not fitness per se (and I am unsure if I want to immediately associate fitness with genetics). Suggestions welcome